Set up
Pumpkins
White bags with sand and a battery powered candle
Sound side speaker with spooky sounds
Additional
Effects fog machine if it is not too windy
Dry Ice caldren
and a screamer
I was lucky I was looking at the text when the screamer came, I hate that

I made a pic today on Microsoft Paint, It's the face from "The scary car ad" all over youtube, google, and many other places. You might wanna save this to zoom in on in Microsoft Paint. You can maybe print them out an hand them to kids on Halloween too.